第二节 根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。

—Hello , may I speak to Dr．Firth?

—__61___ .Dr Firth has just gone to a meeting .

—___62___.

—It’ll be my pleasure.

—I’m Dick .Please tell him to call me when he comes back．I want to know whether my daughter is quite well.

—__63___.Your daughter is quite well now.

—Really?__64___

—-Your daughter Carol, Dad!

—Oh , my dear! __65___

—Yes , I hope I can go back tomorrow.

A．Are you all right now?

B．I’m afraid you can’t

C．Who are you then?

D．That’s great.E．Don’t worry .

F．Would you mind giving him a message?           

G．You’re welcome.

潜在产出的影响因素不包括( )。

A．投入品增长

B．技术水平

C．工资水平

D．效率变动